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Source file test/fixedbugs/bug273.go

Documentation: test/fixedbugs

  // run
  
  // Copyright 2010 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // https://golang.org/issue/589
  
  package main
  
  var bug = false
  
  var minus1 = -1
  var five = 5
  var big int64 = 10 | 1<<32
  
  type block [1<<19]byte
  
  var g1 []block
  
  func shouldfail(f func(), desc string) {
  	defer func() { recover() }()
  	f()
  	if !bug {
  		println("BUG")
  		bug = true
  	}
  	println("didn't crash: ", desc)
  }
  
  func badlen() {
  	g1 = make([]block, minus1)
  }
  
  func biglen() {
  	g1 = make([]block, big)
  }
  
  func badcap() {
  	g1 = make([]block, 10, minus1)
  }
  
  func badcap1() {
  	g1 = make([]block, 10, five)
  }
  
  func bigcap() {
  	g1 = make([]block, 10, big)
  }
  
  type cblock [1<<16-1]byte
  
  var g4 chan cblock
  func badchancap() {
  	g4 = make(chan cblock, minus1)
  }
  
  func bigchancap() {
  	g4 = make(chan cblock, big)
  }
  
  func overflowchan() {
  	g4 = make(chan cblock, 1<<30)
  }
  
  func main() {
  	shouldfail(badlen, "badlen")
  	shouldfail(biglen, "biglen")
  	shouldfail(badcap, "badcap")
  	shouldfail(badcap1, "badcap1")
  	shouldfail(bigcap, "bigcap")
  	shouldfail(badchancap, "badchancap")
  	shouldfail(bigchancap, "bigchancap")
  	shouldfail(overflowchan, "overflowchan")
  }
  

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